/*
 * Copyright (C) 2013 Daniel Wasilew <daniel.wasilew@codeminer.org>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.codeminer.parts.server;

import org.codeminer.parts.application.ApplicationComponent;
import org.codeminer.parts.application.ApplicationContext;
import org.codeminer.parts.application.ShutdownCallback;
import org.codeminer.parts.server.actions.Action;
import org.codeminer.parts.server.actions.Response;
import org.codeminer.parts.server.permissions.Permission;
import org.codeminer.parts.server.permissions.PermissionManager;
import org.codeminer.parts.server.users.User;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Set;

/**
 *
 * @author Daniel Wasilew <daniel.wasilew@codeminer.org>
 */
public final class ActionHandler implements ApplicationComponent {

    private static final Logger log = LoggerFactory.getLogger(ActionHandler.class);
    private ApplicationContext applicationContext;

    @Override
    public void shutdown() {
        
    }

    @Override
    public void startup(ApplicationContext context, ShutdownCallback shutdownCallback) throws Exception {
        applicationContext = context;
    }

    
    public Response execute(Action action, User user) throws NotAuthorizedException, ExecutionException {
        Set<Permission> requiredPermissions = action.requiredPermissions();
        Set<Permission> granted = applicationContext.getApplicationPart(PermissionManager.class).granted(user, requiredPermissions);

        if (!granted.isEmpty()) {
            throw new NotAuthorizedException(user, action);
        }
        try {
            return action.execute();
        } catch (Exception ex) {
            throw new ExecutionException(user, action, ex);
        }
    }

    @Override
    public Class getDescriptionClass() {
        return ActionHandler.class;
    }
}
